Piston ring



S. W. MORROW AND J. SCHLUTTER.

PISTON RING.

APPLICATION FILED uov.9. 1921-.

'1 ,426,4;O3, Patented Aug. 22, 1922.

HH1 im T-- E Samuel Wilson Jiforcoug 'lvhn lj'chlu tier, I

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UNITED sures PATENT; oFFice.

SAMUEL WILSON MOBROW AND JOHN SOHLUT'IEB, CF IAL'IIMOEB, MARYLAND,

ASSIGNOBS TO THE REUS BROS. 60., OF BALTIMORE, MARYLAND, A CORPORA- TION OF MARYLAND.

PISTON RING.

To all whom it my concern:

Be it known that we, SAMUEL W. MORROW and JOHN SoHLU'rrER, citizens of the United States, and residents of Baltimore, Maryland, have invented certain new and useful Improvements in Piston Rings, of which the following is a specification.

The present invention relates to improvements in metallic packing rings designed for use in internal combustion engines.

The invention aims to provide a packing ring which will be of a nature which will reduce the wear on the cylinder walls to a minimum and in which liability of breakage will be eliminated or reduced to a minimum thereby reducing or abolishin the danger of scoring the cylinder walls Ey the action of broken ring parts.

The invention further aims to provide a ring which may be much more economically manufactured than rings heretofore produced. I

With these and other objects in view, the invention includes the novel article hereinafter described and defined by the appended claims, the invention-being illustrated by the accompanying drawing, in which Fig. 1 is a sectional view of one form of our device, showing its relation to the piston groove and the cylinder wall.

Fig. 2 is a side elevation of the disassembled ring and expander of Fig. 1.

Fig. 3 is a sectional view of an overlapped ring. t

Fig. 4 is a side elevation of the disamembled ringof Fig. 3. v

Referring by reference characters to this drawing, in its simpler form, the invention comprises a single split packing ring 1 of a size and shape to fit the ordinary piston groove, which ring we make of bronze or other bearing materials which do not retain inherent spring tension, which is of a nature to reciprocate in contact with the cylinder walls, with a minimum amount of wear of said walls. 7 1

This material lacks the resiliency of spring necessary to kee panded against the cyllnder'wall, andv to secure this expanding action we provide an expanding split ring 2 of suitable sprin or resilient metal, conveniently of stee wfiich is located in a groove 1 in the inner face of the ring 1.

Specification of Letters Patent.

Application filed fflovemuer 9, 1921. Serial No. 513,966.

it pressed or ex- Patented Aug. 22, 1922.

In another embodiment oftheinvention the ring 1 is made of two split parts 1 and 1 having overlapping annular ribs or flanges and inclined inner walls a and b which form a channel to receive the. expanding ring 2* which not only tends to expand the rings but also to separate them' so as to press them against the opposing walls of the groove and thereby sealing the same and prevent the pumping of oil, and-fwear on piston ring grooves.

Either the ring 1 of the first form described, or the duplex rings 1" and 1 of the secondform, ma be made-by drawing the metal to the required shapein cross section by suitable dies and thereafter bending it into the required curve due to the fact that no temper is necessary; and as'the expander may be formed from ordinaryresilient steel wire, the complete piston rings" may be very the piston ring groove, and a separate resili-' ent expander'member cooperating therewith.

2. A multiple part piston ring including a drawn metal member in the piston ring groove and contacting with the walls of the cylinder and a 'side wall of the'ring oove, and a separate'r'esilient expander r ng'cooperating therewith. i

3. A multiple part piston rin including a drawn metal member of'the ull width of the groove in the piston adapted to bear against the cylinder wall, and a separate resilient expander ring cooperatingtherewith.

In testimony whereof, we afiix our signatures.

I SAMUEL WILSON MORROW. JOHNSCHLUTTER. 

